Why does the sentiment analysis classified a negative text as positive?

User: "AmosGH"
New Altair Community Member
Updated by Jocelyn
I run some sentiment analysis but it gave me wrong analysis in the sense that a text that supposes to be negative was classified as positive. What accounts for this misinterpretation and what can be done to rectify it. Again how does the sentiment analysis from Aylien classified a text to be negative, positive and neutral?